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Dark brown dotted line represents the outline of the atrial walls. 1. Right coronary artery, 2. Right anterior atrial branch (main atrial branch in this fig), 3. Right intermediate branch, 4. Right posterior branch, 5. Kugel arterial anastomosis, 6. Left circumflex artery, 7. Left anterior atrial branch, 8. Left intermediate atrial branch, 9. Left posterior branch, 10. Left atrial circumflex, 11. Atrioventricular nodal artery.
